An antibiotic is a medicine that slows, stops, or kills germs. The germs are usually bacteria causing an infection in a person, so the person uses antibiotics to help his body get rid of the infection.
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2

Various reasons:
Pseudomonas is a very common bacteria which has developed many clever ways of resisting different antibiotics. It can destroy the antibiotics with chemicals, pump the antibiotics out of its cell or become 'invisible' to antibiotics by changing the appearance of the bacteria. Pseudomonas can adapt to antibiotics & change during the course of treatment. Serious infections often require an expert.
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3

All can:
Any antibiotic can interfere with the effectivness of birth control agents. Secondary method of protection is recommended while taking and for at least 2 weeks after finished. Ask your gyn for specifics.
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7

See your doctor:
A new antibiotic probably wouldn't help. Sinus symptoms are mostly from inflammation causing swelling of sinus passages, regardless of the speciifc bacteria or infection. And almost all bacteria in true sinus infection would be covered by cipro, (ciprofloxacin) doxy, or both. Same for most causes of UTI (bladder infection). Bladder problem maybe vaginal yeast due to all the antibiotics. Discuss with your doctor.
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8

Probably best:
That you take it a bit easy, as fluoroquinolones, the antibiotic class of levofloxacin, is associated with tendon problems including rare achillles tendon ruptures. But if your are taking an antibiotic, it tells me you have some infection requiring treatment, and that independent of the antibiotic you are taking, you should be resting - though I wouldn't encouraged bed rest either.
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9

No:
No, but since they both have good (and somewhat overlapping) spectrums of activity, you likely will not need two antibiotics at the same time. Consider at least culturing your uti, especially if you are prone to recurrent infections - it may help identify a source......
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11

Weeks :
Nothing works overnight for acne, except perhaps steroid injections into individual lesions.
You might get lucky and see improvement in just a week, but you should be prepared to give it 6 weeks.
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12

Work for what?:
Being a strep carrier is not the same as having an infection. Normally no antibiotics are necessary and may even cause problems (like thrush, diarrhea, etc.) a good review of the subject is at: http://www.Pediatricweb.Com/madisonpeds/article.Asp?Articletype=9&articleid=851.
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13

Not necessarily:
Both medications are commonly prescribed for sinus infections but Augmentin (amoxicillin and clavulanate) tends to be more effective in covering bacteria that Amoxicillin does not cover well. Augmentin (amoxicillin and clavulanate) is essentially Amoxicillin plus clavulanic acid.
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17

It depends...:
...on how soon you vomit after each dose. Within 30 minutes, treatment may not work. After a half hour, usually enough antibiotic is retained or has been absorbed to still be effective. If both doxycycline and metronidazole, don't take them together and take both with food. Avoid alcohol. Also, azithromycin 1 dose can replace doxycycline. Discuss all this with the doctor or clinic treating you.
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18

May be viral or...:
Viral eye infections are like the common cold...They don't respond to antibiotics and just need to run their course. Or, maybe it is not an infection, but rather an inflammatory problem. If not responding to drops within 7-10 days, see an eye doctor for further examination to figure out what the real problem is.
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19

Not a normal med:
Bactrim (sulfamethoxazole and trimethoprim) can be effective, but it is far down on the list of first choices for a dental infection. There are other antibiotics much more suited to dental bacteria.
Your dentist should be able to check your medical history and get you a medication that will work better. Please get treatment as well, antibiotics are short term solutions and cannot reach bacteria inside a tooth.
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20

No:
They don't cancel each other out. There are times when we feel it is necessary to use 2 antibiotics from 2 different classes (such as Bactrim (sulfamethoxazole and trimethoprim) and Keflex) to cover the infection. I would continue both as your doctor prescribed.
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